Cultural relativism states that what is morally permissible or impermissible is determined entirely by either the culture you're in or the culture you came from. This is helpful when looking at cultures and thinking about how to fit into a given culture (things such as what is indecent, what is considered insulting, what forms of punishment are permissible), but it's denial of a moral absolute can seem unsatisfying, especially as many cultures share certain core moral beliefs (i.e. you shouldn't kill people)